scholarly journals Determination of the serviceability of bridge upper structures (Case study: Sangsang River bridge at Tohpati-Kusamba highway, Bali)

2019 ◽  
Vol 276 ◽  
pp. 01039
Author(s):  
I Nyoman Sutarja ◽  
Ida Bagus Rai Widiarsa ◽  
I Made Alit Karyawan Salain
Keyword(s):  
Concrete Slab ◽  
Test Method ◽  
Bridge Structure ◽  
Digital Tool ◽  
Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Non Destructive ◽  
Concrete Girder

The serviceability of upper structures of the Sangsang River Bridge during the designed period has decreased due to several factors such as environmental influences affecting the physical condition of the bridge, as well as the load that exceeds the designed capacity. Sangsang River Bridge needs to be maintained during the serviceability period in order to function optimally, safely and comfortably. The maintenance of the bridge begins with the examination of the existing condition of the bridge by utilizing Non-Destructive Test method using UPV Pundit PLLink 500 Digital tool. The data collected was then analysed to find out the serviceability of bridge structure. The analysed results showed that the value of concrete slab density was 17.8 MPa and of the concrete girder was 18.1 MPa. This values were classified as a deficient criterion and therefore the serviceability needs to be increased. Recommendations for enhancing the bridge serviceability was strengthening using Fibre Reinforced Polymer (FRP). Using 2 Layer SEH-51A or equivalent 2 Layer of E-glass fibre was suggested for concrete slab, meanwhile the use of 2 Layer SCH-41 or equal to 2 Layer Carbon fibre was suggested for concrete girder.

Corrosion Metal Loss Interaction From In-Line Inspection and How it Can Affect the Calculated Failure Pressure

2012 ◽  
Author(s):  
Lucinda Smart ◽  
Richard McNealy ◽  
Harvey Haines
Keyword(s):  
Field Measurements ◽  
Metal Loss ◽  
Data Correlation ◽  
Failure Pressure ◽  
Industry Standards ◽  
Direct Measurements ◽  
Non Destructive ◽  
Flux Leakage

In-Line Inspection (ILI) is used to prioritize metal loss conditions based on predicted failure pressure in accordance with methods prescribed in industry standards such as ASME B31G-2009. Corrosion may occur in multiple areas of metal loss that interact and may result in a lower failure pressure than if flaws were analyzed separately. The B31G standard recommends a flaw interaction criterion for ILI metal loss predictions within a longitudinal and circumferential spacing of 3 times wall thickness, but cautions that methods employed for clustering of ILI anomalies should be validated with results from direct measurements in the ditch. Recent advances in non-destructive examination (NDE) and data correlation software have enabled reliable comparisons of ILI burst pressure predictions with the results from in-ditch examination. Data correlation using pattern matching algorithms allows the consideration of detection and reporting thresholds for both ILI and field measurements, and determination of error in the calculated failure pressure prediction attributable to the flaw interaction criterion. This paper presents a case study of magnetic flux leakage ILI failure pressure predictions compared with field results obtained during excavations. The effect of interaction criterion on calculated failure pressure and the probability of an ILI measurement underestimating failure pressure have been studied. We concluded a reason failure pressure specifications do not exist for ILI measurements is because of the variety of possible interaction criteria and data thresholds that can be employed, and demonstrate herein a method for their validation.

Hybrid simulation of a carbon fibre–reinforced polymer-strengthened continuous reinforced concrete girder bridge

2017 ◽  
Vol 20 (11) ◽  
pp. 1658-1670 ◽  
Author(s):  
Shizhu Tian ◽  
Hongxing Jia ◽  
Yuanzheng Lin
Keyword(s):  
Reinforced Concrete ◽  
Carbon Fibre ◽  
Hybrid Simulation ◽  
Simulation System ◽  
Reinforced Polymer ◽  
Carbon Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Girder Bridge ◽  
Concrete Girder ◽  
Hybrid Simulations

The behaviour of bridge columns strengthened using carbon fibre–reinforced polymer composites has been studied extensively. However, few investigations have been conducted regarding the influence of carbon fibre–reinforced polymer-strengthened columns on the seismic behaviour of reinforced concrete continuous girder bridges. This article details the hybrid simulations of a continuous reinforced concrete girder bridge whose columns are strengthened by carbon fibre–reinforced polymer jackets. In the hybrid simulations, one ductile column is selected as the experimental element, which is represented by a 1/2.5-scale specimen, and the remaining bridge parts are simultaneously modelled in OpenSees (the Open System for Earthquake Engineering Simulation). After combining the experimental element and the numerical substructure, the hybrid analysis model is developed with the established hybrid simulation system. The displacements of the bridge and the lateral force–displacement response of the experimental element in hybrid simulation are obtained. Compared with the results of numerical simulation, the stability and accuracy of the established hybrid simulation system are demonstrated. Meanwhile, the comparative hybrid simulation results of the as-built bridge and the carbon fibre–reinforced polymer-strengthened bridge also prove the effectiveness of the carbon fibre–reinforced polymer jackets’ confinement in the continuous reinforced concrete girder bridge.

Acoustic Emission Signals of Pull-Off Test for Concrete Slab Strengthened with CFRP Using Various Surface Preparations

2019 ◽  
Vol 821 ◽  
pp. 479-485
Author(s):  
Md Nor Noorsuhada ◽  
Mat N. Soffian Noor ◽  
A.M. Siti Norfahanim ◽  
M.H. Mohd Hisbany ◽  
M. Norfaridah
Keyword(s):  
Acoustic Emission ◽  
Concrete Slab ◽  
Surface Preparation ◽  
Signal Strength ◽  
Acoustic Emission Technique ◽  
Normal Surface ◽  
Reinforced Polymer ◽  
Carbon Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Concrete Interface

This study investigates the acoustic emission signals of concrete slab strengthened with carbon fibre reinforced polymer (CFRP) under pull-off test. Three types of surface preparations were prepared namely without surface preparation, normal surface preparation and boring surface preparation. The slabs were then tested under pull-off test in conjunction with acoustic emission technique. The pull-off strength, acoustic signal strength, amplitude, duration and rise time were analysed and discussed. It was found that the boring surface preparation produced the highest pull-off strength compared to other surface preparations, indicating good bonding between the CFRP and the concrete interface. This study is useful in identifying the bonding between CFRP and concrete using acoustic emission technique.

Determination of Optimal Nondestructive Technique (NDT) Using Multi-Criteria Analysis

2015 ◽  
Vol 760 ◽  
pp. 615-620
Author(s):  
Alexandru Stefan Leonte ◽  
Anișor Nedelcu ◽  
Razvan Gabriel Dragan
Keyword(s):  
Surface Defects ◽  
Concrete Slab ◽  
Nondestructive Technique ◽  
Impact Echo ◽  
Ultrasonic Methods ◽  
Different Depths ◽  
Multi Criteria Analysis ◽  
The Cost ◽  
Non Destructive

The present paper presents an optimization model for quality control of industrial products by using two non-destructive techniques (NDT): infrared termography and ultrasonic methods. The main purpose it is to determinate the best analyzing method using multi-criteria analysis by taking into account the results that outcome from the two non-destructive evaluations. There have been studied defects like: internal defects and surface defects. Therewith were taking into consideration: safety, efficiency of the method and the cost of the equipment used in controlling the product. For this study it was created a concrete slab with embedded defects which had different depths. The sample was tested using active thermography and impact echo methods and the results were studied and integrated in an multi-criteria analysis to reveal the best method for this case.

Carbon Footprint Analysis of Fibre Reinforced Polymer (FRP) Incorporated Pedestrian Bridges: A Case Study

2012 ◽  
Vol 517 ◽  
pp. 724-729
Author(s):  
Jian Guo Dai ◽  
Tamon Ueda
Keyword(s):  
Construction Industry ◽  
Carbon Footprint ◽  
Prestressed Concrete ◽  
Environmental Friendliness ◽  
Pedestrian Bridge ◽  
Reinforced Polymer ◽  
Pedestrian Bridges ◽  
Fibre Reinforced Polymer ◽  
Footprint Analysis

This paper presents a case study on the carbon footprint of a fibre reinforced polymer (FRP)-incorporated pedestrian bridge in comparison with a conventional prestressed concrete (PC) one. The CO2 emission is used as an index and calculated for both the material manufacturing and the construction processes. It is shown that using an FRP-incorporated pedestrian bridge to replace a conventional prestressed concrete (PC) bridge may reduce the CO2 emission by 18% and 70%, respectively, during the material manufacturing and construction periods, leading to a total reduction by about 26%. Such reduction is expected to be more significant if the life-cycle CO2 emission is accounted for, since the former type of bridge is free of corrosion and almost maintenance-free. Therefore, FRP-incorporated bridges may become a more competitive alternative to conventional reinforced concrete (RC) or PC ones with the increasing attention paid on the sustainability and environmental friendliness of construction industry by our society.

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